It is very good. If you have the first one there's a DLC to combine the maps of both games for a giant campaign. They are the most varied Total War games about, the differences between the races is much larger than the national differences of a normal total war game.

The lab battle mode is out now. Let you dick around with loads of settings for a custom battle, including making units 10x larger. 1800 Zombies per unit a go-go. Had a battle beteen 30k zombies and about 7k empire troops. Takes ages to kill that many zombies. Plus charging 800+ Knights into a massive unit at once is quite devastating.